Question

If the polynomial p(x)=2x3 - Kx2+5x + 2 is exactly divisible by (x + 2), then k = ?​
solve this


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Answer 1

Answer:

Question,

p(x)=2x³-Kx²+5x+2

g(x)=x+2

=x=-2

p(-2)= 2(-2)³-K(-2)²+5(-2)+2

p(-2)= 2(-8)-K(4)+5(-2)+2

p(-2)= -16-4K+(-10)+2

p(-2)= -16-4K-10+2

p(-2)= -26+2-4K

p(-2)= -24-4K

p(-2)= -24-4(-6)

p(-2)= -24-24

p(-2)= 0

therefore: K=-6.....

Answer 2

Step-by-step explanation:

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